Delta RMC101 User Manual download pdf (Page 784)

100

101

RMC100 and RMCWin User Manual

C-14

Range: 0 to 2000

Some valves and drives do not react to small changes in output around the null drive value; this

effect is termed "dead band". The Dead Band Eliminator helps alleviate this problem by applying

extra drive.

The RMC100 has two different Deadband eliminator algorithms:

• Proportional (recommended)

The number of millivolts specified in the Dead Band Eliminator value is added to or subtracted

from the drive output (depending on the direction of travel) when the Actual Position is outside of

the In Position window. This causes the drive to be outside of the deadband. When the Actual

Position is within the In Position window, the drive is applied proportional to the distance from

the actual position. The Integral gain is always held at its current value. This algorithm is the

recommended algorithm.

• Immediate (RMC100 default)

The number of millivolts specified in the Dead Band Eliminator value is always added to or

subtracted from the drive output (depending on the direction of travel) so the drive output is

outside the dead band.

Note: In RMC100 CPU firmware prior to 20030916, the Dead Band Eliminator always used the

immediate algorithm.

If a value outside the valid range is entered, the parameter error bit will be set, and the value will

be set to zero.

CAUTION: Do not make this value too large or the drive will oscillate.

Selecting a Deadband Algorithm

To select a Deadband algorithm follow these steps:

1. In RMCWin, on the Tools menu, click Module Configuration.

2. In the Slots list, click the CPU.

3. Click Slot Options. The RMC100/101 CPU Options dialog box will be displayed.

4. Click the Deadband tab.

5. Select an algorithm.

6. Click Update RMC.

7. The Update Module Configuration dialog box will be displayed to indicate the progress. If the

module could not be reset automatically, you may be prompted to reset the module yourself.

C.1.19 In Position

Default: 50

Range: 0 to 65535

This parameter specifies the size of a window around the Command Position. When the Actual

Position gets within this window, the In Position bit is set in the Status word. Notice that the In

Position bit is not latched and therefore could go off again if the axis moves back outside the In

Position window.

Example:

1 2 ... 779 780 781 782 783 784 785 786 787 788 789 ... 950 951

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Delta RMC101 User Manual Page 784

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